Below is an interesting article, with some data, that illustates how the maximum gain from "ram air boost" would be around 2 hp at ~140mph. I would really only think that removing the headlight would be something i would do on a track only car, or maybe just take it out for events. Plus it is not the most aesthetically pleasing mod.EdZ

I'm going to get this air box soon.now have you reall looked at your headlights? other than the .1cm ring around the headlamps or the small amount of slatts in betweeen the headlamp and the radiator (where the M3 badge goes) all of the slats are closed off. I would think that there is minimal air comming in from "directly" behind the headlights. Now what if you did thiswouldn't this open up that aera behind the headlamp a lot? not necessarily creating a "ram air" but letting the engine breathe much easier?Just my .02Eric88M3